Auto merge of #26688 - servo:dependabot/cargo/tokio-codec-0.1.2, r=jdm

Bump tokio-codec from 0.1.0 to 0.1.2

Bumps [tokio-codec](https://github.com/tokio-rs/tokio) from 0.1.0 to 0.1.2.
<details>
<summary>Commits</summary>
<ul>
<li><a href="571a48255e"><code>571a482</code></a> Bump to 0.1.2</li>
<li><a href="ba19515833"><code>ba19515</code></a> Clarify a comment</li>
<li><a href="a21153a0e9"><code>a21153a</code></a> Clear out old <code>Signal</code> on drop</li>
<li><a href="83a5277af1"><code>83a5277</code></a> Touch up more impls and comments</li>
<li><a href="b748fa955c"><code>b748fa9</code></a> Handle a few more errors</li>
<li><a href="277fff43f5"><code>277fff4</code></a> Various cleanups:</li>
<li><a href="a02a38fbae"><code>a02a38f</code></a> The driver task</li>
<li><a href="f7167b48a7"><code>f7167b4</code></a> Provide the new kind of Signal stream</li>
<li><a href="8abc26df39"><code>8abc26d</code></a> Implement the wake-up part of the new signal handling</li>
<li><a href="b9da819153"><code>b9da819</code></a> Use tokio-core from git</li>
<li>Additional commits viewable in <a href="https://github.com/tokio-rs/tokio/compare/tokio-codec-0.1.0...0.1.2">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -5904,9 +5904,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-codec"
-version = "0.1.0"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "881e9645b81c2ce95fcb799ded2c29ffb9f25ef5bef909089a420e5961dd8ccb"
+checksum = "25b2998660ba0e70d18684de5d06b70b70a3a747469af9dea7618cc59e75976b"
 dependencies = [
  "bytes",
  "futures",